Downtown Houston, Texas is reflected in flooded Buffalo Bayou Wednesday, Aug. 30, 2017, as the city continues to recover from record flooding caused by Hurricane Harvey.

Rescue boats fill a flooded street as flood victims are evacuated as floodwaters from Tropical Storm Harvey rise on Monday in Houston. Angels All-Star Mike Trout announced via Twitter on Tuesday that he was donating $27,000 – an amount to correspond to his jersey No. 27 – to aid the relief effort. (AP Photo/David J. Phillip)

A man talks with officers at a roadblock less than three miles from the Arkema Inc. chemical plant Thursday, Aug. 31, 2017, in Crosby, Texas. The Houston-area chemical plant that lost power after Harvey engulfed the area in extensive floods was rocked by multiple explosions early Thursday, the plant’s operator said. The Arkema Inc. plant had been left without refrigeration for chemicals that become volatile as the temperature rises. (AP Photo/Gregory Bull)

Robert Spooner, a U.S. Customs and Border patrol officer, center, and other volunteers work to prepare boats to help people in the aftermath of Harvey, Wednesday, Aug.30, 2017 in Houston. Harvey’s floodwaters started dropping across much of the Houston area, but many thousands of homes in and around the nation’s fourth-largest city were still swamped and could stay that way for days or longer. (Brett Coomer/Houston Chronicle via AP)

The Arkema Inc. chemical plant is flooded from Tropical Storm Harvey, Wednesday, Aug. 30, 2017, in Crosby, Texas. The plant, about 25 miles (40.23 kilometers) northeast of Houston, lost power and its backup generators amid Harveys dayslong deluge, leaving it without refrigeration for chemicals that become volatile as the temperature rises. (Godofredo A. Vasquez/Houston Chronicle via AP)

U.S. Border Patrol Agent Steven Blackburn, left, checks if people wading in water need help during a search a rescue operation in a neighborhood inundated by floodwaters from Tropical Storm Harvey in Houston, Texas, Wednesday, Aug. 30, 2017. (AP Photo/LM Otero)

Floodwaters fill the road running through the Lakes On Eldridge North subdivision in the aftermath of Tropical Storm Harvey on Wednesday, Aug. 30, 2017, in Houston. (Brett Coomer/Houston Chronicle via AP)

Residents wait for rescue at an apartment complex after it was inundated with water following Hurricane Harvey on August 30, 2017 in Houston, Texas. Harvey, which made landfall north of Corpus Christi August 25, has dumped nearly 50 inches…